One of the great question marks of 2012 has to be Alfonso Cuarón's "Gravity." The Mexican director hasn't made a feature film since the widely loved sci-fi film "Children of Men" in 2006, and so far, we've only heard about casting drama from his follow-up effort.

When Bullock spoke with MTV News' Josh Horowitz while promoting "Extremely Loud & Incredibly Close," she finally shed some light on the mystery project. Whispers of the look and scale of the film have been some of the few details that have slipped through, and Bullock was certainly qualified to confirm the rumors.

"It is extraordinary, and I have the messed-up back to prove it," she said with a laugh, later adding that the film's technology will "blow your mind."

We also know the film's setting — space — and there's been talk of the isolation Bullock's character experiences throughout the film. Bullock spoke about working on the set and the rig she spent most of her days in.

"The first day of set, we're on a massive soundstage. All I see is this large, black arm. ... I realize that's what made the cars in Detroit," Bullock joked. "We called her 'Iris,' and she was on a long track, and there was a cube of lights with this metal contraption in it. They go, 'That's the light box where you're going to be.' "

Bullock said she was either locked in the box or strung up in a rigging system until Clooney arrived on set, but once he left, things returned to normal. "I never had a human being to interact with until George showed up, and when he left, it was like the great vacuum. It was isolation like I had never experienced in my life," she said.

When pressed to describe the tone of the film, Bullock struggled to pin down exactly how to describe it.

"It is going to be so profoundly silent and big and loud. I don't know how to explain it, because I have never seen anything like it. I never experienced anything like it," she said. "There are no words in my mental dictionary that can describe what this experience was, but once you see it, you're, you're just going to be like, 'Oh my f---ing God.' "